A method for measuring pipeline path and depth using radiation method

Abstract

The present invention relates to the field of pipeline detection technology, specifically a method for measuring the path and depth of a pipeline using a radiation method. A first group of receiving coils is set at the same intervals above and below the transmitting coil. The first group of receiving coils can receive signals generated by the transmitting coils with the same strength. The signal strengths of the two coils of the first group of receiving coils can be collected in real time. At this time, subtracting the two coils can eliminate the influence of the transmitting coil. The main factor affecting the difference in the strength of the received signals is the signal radiated by the signal received by the underground pipeline. Finally, the distance from the transmitting coil to the underground pipeline is solved. If the distance has a solution, it means that there is a pipeline buried underground. If there is no solution, it means that there is no pipeline below the detection point. The present invention adopts an integrated setting of the transmitting coil and the collecting coil, which can be operated by one person and at the same time achieve no duplication in the detection path, which can greatly improve the detection efficiency and construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and in particular to a method for measuring the path and depth of a pipeline using a radiation method. Background Art

[0002] In order to avoid electric shock accidents, power outages, and gas leaks during construction, it is necessary to detect underground pipelines in the construction area. Currently, the most commonly used method for detecting underground pipelines is radiation detection. The detection equipment for the radiation method includes a transmitter and a detector. The transmitter and detector need to be used in conjunction, and the site, position, and direction must be constantly changed to fully detect the pipelines in the construction area. This detection method requires the cooperation of two workers, and the long distance of walking in the area is both manpower-consuming and time-consuming, which greatly reduces construction efficiency and affects the construction progress. In addition, the detection device can only detect the path and cannot accurately calculate the depth of the burial. During the construction process, more cautious excavation is still required. Therefore, it is an urgent need to design a radiation method for measuring pipeline paths and depths that can be operated by one person and requires less walking distance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for measuring the path and depth of a pipeline using a radiation method which can be operated by one person and has a short walking distance.

[0004] The technical solution to the technical problem to be solved by the present invention is: a method for measuring the depth of a pipeline using a radiation method, wherein two groups of receiving coils are symmetrically arranged on the upper and lower sides of a transmitting coil, wherein: the first group of receiving coils includes a first lower receiving coil located below the transmitting coil and a first upper receiving coil located above the transmitting coil, and the first lower receiving coil and the first upper receiving coil are spaced apart from the transmitting coil by a distance of Ln; the second group of receiving coils includes a second lower receiving coil located below the first lower receiving coil and a second upper receiving coil located above the first upper receiving coil, and the second lower receiving coil and the second upper receiving coil are spaced apart from the transmitting coil by a distance of Lm; the intensities of electromagnetic signals collected by the receiving coils at the detection point are respectively:

[0005] The signal strength collected by the first receiving coil is Ba, and

[0006]

[0007] The signal strength collected by the first upper receiving coil is Bb, and:

[0008]

[0009] The signal strength collected by the second receiving coil is Bc, and:

[0010]

[0011] The signal strength collected by the second upper receiving coil is Bd, and:

[0012]

[0013] Where H is the assumed pipeline depth, K is the comprehensive coefficient, then let:

[0014]

[0015] The solution is:

[0016]

[0017] When the solution value of H is obtained, it means that there is a pipeline buried underground. When Ba-Bb=0 and Bc-Bd=0, H has no solution, which means that there is no pipeline under the detection point.

[0018] Better yet, Lm is not equal to Ln.

[0019] Better yet, the comprehensive coefficient

[0020]

[0021] Among them, Bn=Ba-Bb, Bm=Bc-Bd.

[0022] More preferably, a third receiving coil is provided on the periphery of the transmitting coil, the axis of the third receiving coil is perpendicular to the axis of the transmitting coil, and the axis of the third receiving coil passes through the center of the transmitting coil.

[0023] More preferably, the third receiving coil and the transmitting coil are in the same plane.

[0024] Better yet, scan the area to be tested along an S-shaped curve or spiral line to determine whether the signal strength of Bn or Bm is the largest. If it is the largest, it means that the detector is located directly above the pipeline, and the measurement of the pipeline depth is started at this time.

[0025] A method for measuring pipeline path and depth using radiation method:

[0026] Step 1: Scan the area to be tested at the edge of the area to be tested;

[0027] Step 2: After detecting the Bn or Bm signal, move within a small range and determine whether the Bn or Bm signal strength is the largest;

[0028] Step 3: Mark the position where the maximum Bn or Bm signal is detected as the position of the pipeline;

[0029] Step 4: Detect the pipeline depth above the pipeline location.

[0030] Preferably, in step 3: the detector is rotated at the marked position, the direction in which the Bn or Bm signal strength is the largest is the cable laying direction, and the pipeline laying direction is perpendicular to the axis of Bn or Bm.

[0031] A detector for measuring pipeline paths using a radiation method, comprising a power supply module, a human-computer interaction module, and a controller, and characterized by:

[0032] It also includes a transmitting coil and two sets of receiving coils symmetrically arranged on the upper and lower sides of the transmitting coil, wherein:

[0033] The first group of receiving coils includes a first lower receiving coil located below the transmitting coil and a first upper receiving coil located above the transmitting coil, and the first lower receiving coil and the first upper receiving coil are spaced apart from the transmitting coil by a distance Ln;

[0034] The second group of receiving coils includes a second lower receiving coil located below the first lower receiving coil and a second upper receiving coil located above the first upper receiving coil, and the distance between the second lower receiving coil and the second upper receiving coil and the transmitting coil is Lm;

[0035] The transmitting coil, the receiving coil and the controller are electrically connected;

[0036] During detection, determine whether the value of Bn or Bm is the largest, where Bn=Ba-Bb, Bm=Bc-Bd, Ba is the signal strength collected by the first lower receiving coil, Bb is the signal strength collected by the first upper receiving coil, Bc is the signal strength collected by the second lower receiving coil, and Bd is the signal strength collected by the second upper receiving coil. When Bn or Bm is the largest, it indicates that there is a pipeline buried below the detection location, and the detection location is marked.

[0037] The beneficial effects of the present invention are:

[0038] 1. The integrated setting of transmitting coil and collecting coil can realize single-person operation, facilitate construction and improve efficiency.

[0039] 2. Using this method for detection can achieve no duplication of detection paths, thereby greatly improving detection efficiency.

[0040] 3. By setting up a third receiving coil, the direction of the buried pipeline can be detected. For the detection of a single pipeline, unnecessary path duplication can be greatly reduced, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 2 This is a schematic diagram of setting up the test pipeline routing function.

[0042] Figure 1 It is a schematic diagram of an embodiment of the present invention.

[0043] In the picture:

[0044] Se, third receiving coil; Sd, second upper receiving coil; Sc, second lower receiving coil; Sb, first upper receiving coil; Sa, first lower receiving coil; T, transmitting coil; DETAILED DESCRIPTION

[0045] In order to make the technical solutions and beneficial effects of the present invention clearer, the embodiments of the present invention are further explained in detail below.

[0046] A method for measuring pipeline depth using radiation utilizes a detection device equipped with a transmitting coil T. To achieve an integrated design of the transmitting coil T and receiving coil, two sets of receiving coils are symmetrically arranged above and below the transmitting coil T. After the pre-buried pipeline location is determined, this method can be used to detect the pipeline depth.

[0047] The first receiving coil group includes a first lower receiving coil Sa located below the transmitting coil T and a first upper receiving coil Sb located above the transmitting coil T. Both the first lower receiving coil Sa and the first upper receiving coil Sb are spaced Ln apart from the transmitting coil T. The second receiving coil group includes a second lower receiving coil Sc located below the first lower receiving coil Sa and a second upper receiving coil Sd located above the first upper receiving coil Sb. Both the second lower receiving coil Sc and the second upper receiving coil Sd are spaced Lm apart from the transmitting coil T.

[0048] The distance Ln between the first set of receiving coils and the transmitting coils ranges from 5 cm to 500 cm. The distance Lm between the second set of receiving coils and the transmitting coils ranges from 5 cm to 500 cm. Lm and Ln are different values.

[0049] The main technical problem to be solved by the integrated design of transmitting coil and receiving coil is that the receiving coil can receive the signal of the transmitting coil, which in turn affects the data sampled by the receiving coil. Figure 1As shown, in this method, a first set of receiving coils is positioned above and below the transmitting coil T, spaced a uniform distance Ln apart. Since the first lower receiving coil Sa and the first upper receiving coil Sb of the first set of receiving coils are spaced the same distance from the transmitting coil T, they can receive signals generated by the transmitting coil T with the same strength. Furthermore, the actual signal strengths of the first lower receiving coil Sa and the first upper receiving coil Sb can be obtained through actual acquisition. Subtracting the signal strengths of the first lower receiving coil Sa and the first upper receiving coil Sb can eliminate the influence of the transmitting coil T. The primary factor affecting the signal strengths of the first lower receiving coil Sa and the first upper receiving coil Sb is the signal radiated by the underground pipeline. Specific calculations can be performed by sampling the voltage or magnetic induction intensity of each coil. Alternatively, analog circuits can be used to directly subtract the signals, and then the subtracted signals can be collected for calculation.

[0050] Take the collection and calculation of the magnetic induction intensity of each coil as an example.

[0051]

[0052] Where B is the magnetic induction intensity, μ is the vacuum magnetic permeability, r is the distance from the point to the straight wire, and I is the current in the straight wire. When the first lower receiving coil Sa, the first upper receiving coil Sb, the second lower receiving coil Sc, and the second upper receiving coil Sd collect the magnetic induction intensity of the straight wire, the current in the straight wire is a fixed value relative to the four coils. Therefore, the comprehensive coefficient K is set as follows:

[0053]

[0054] At this time, the magnetic induction intensity collected by each coil is only related to the distance r between the coil and the straight wire. Figure 1 As shown, two groups of receiving coils are symmetrically arranged on the upper and lower sides of the transmitting coil T. The first group of receiving coils includes a first lower receiving coil Sa located below the transmitting coil T and a first upper receiving coil Sb located above the transmitting coil T, and the distance between the first lower receiving coil Sa and the first upper receiving coil Sb and the transmitting coil T is Ln; the second group of receiving coils includes a second lower receiving coil Sc located below the first lower receiving coil Sa and a second upper receiving coil Sd located above the first upper receiving coil Sb, and the distance between the second lower receiving coil Sc and the second upper receiving coil Sd and the transmitting coil T is Lm; assuming that the distance between the transmitting coil T and the straight wire is H. At this time, the distance between each coil and the straight wire is r a =H-Ln、r b =H+Ln、r c =H-Lm, r d =H+Lm.

[0055] The signal strength collected by the first receiving coil Sa is:

[0056]

[0057] The signal strength collected by the first upper receiving coil Sb is:

[0058]

[0059] The signal strength collected by the second receiving coil Sc is:

[0060]

[0061] The signal strength collected by the second upper receiving coil Sd is:

[0062]

[0063] Since the first lower receiving coil Sa and the first upper receiving coil Sb are at the same distance from the transmitting coil T, they are affected by the magnetic field of the transmitting coil T in the same way, that is, the influence on them is Btm.

[0064] At this time, let:

[0065]

[0066] Among them, Ba, Bb, Bc, and Bd can be directly collected by the collection device, and can be obtained:

[0067]

[0068] Right now

[0069] .

[0070] Since there is only one unknown variable H, we can solve it and get:

[0071]

[0072]

[0073] Multiplying both the numerator and denominator by -1 gives the following solution:

[0074]

[0075] When the value of H can be solved, it means that there are pipelines buried underground. When H has no solution, it means that there are no pipelines buried underground.

[0076] Better, for the convenience of calculation, Lm=λLn can be obtained:

[0077]

[0078] Furthermore, if λ=2, we can get .

[0079] Better, in order to detect the direction of the buried wire, such as Figure 2 As shown, a third receiving coil Se is provided on the periphery of the transmitting coil T, the axis of the third receiving coil Se is perpendicular to the axis of the transmitting coil T, and the axis of the third receiving coil passes through the center of the transmitting coil T.

[0080] At this point, the third receiving coil Se is unaffected by the signal from the transmitting coil T. The third receiving coil Se has different signal polarities on the left and right sides of the pipeline, and the signal is minimum directly above the pipeline. This feature is used to detect whether the pipeline is on the left or right side of the detector.

[0081] During the movement detection process, if a reflected signal is detected, the Bn or Bm value will be collected. The cable position is then determined by judging the change in Bn or Bm signal strength. During movement, if the signal continues to increase, it indicates that the pipeline is gradually approaching; if the signal continues to decrease, it indicates that the pipeline is moving away. The detected signal value is the largest when it is directly above the pipeline. Therefore, the pipeline's position can be determined through a small range of movement. After the pipeline's position is determined, the depth is measured directly above the pipeline. Rotate the detector directly above the pipeline. The direction with the highest Bn or Bm signal strength is the direction of cable laying. The pipeline laying direction is perpendicular to the axis of Bn or Bm.

[0082] Based on this, when detecting pipeline depth, the pipeline path is first detected. After the pipeline's path is determined, the pipeline depth along the path is detected through multi-point detection to determine the overall pipeline depth. Alternatively, the area to be tested is scanned along an S-shaped curve or spiral line. When a Bn or Bm signal is detected, the detector stops and then moves within a small range to determine whether the Bn or Bm signal strength is maximum. If it is, it indicates that the detector is directly above the pipeline. At this point, the pipeline path point can be marked and pipeline depth measurement can be initiated.

[0083] A method for measuring pipeline path and depth using a radiation method comprises the following steps:

[0084] Step 1: Scan the area to be tested at the edge of the area to be tested.

[0085] Step 2: After detecting the Bn or Bm signal, move within a small range and determine whether the signal strength of Bn or Bm is the largest.

[0086] Step 3: Mark the position where the maximum Bn or Bm signal is detected as the position of the pipeline.

[0087] Better yet, rotate the detector at the marked position, and the direction with the maximum Bn or Bm signal strength is the cable laying direction.

[0088] Step 4: Detect the pipeline depth above the pipeline location.

[0089] A detection device, namely a detector for measuring pipeline paths using a radiation method, is manufactured based on a method for measuring pipeline paths using a radiation method. The detector includes a power module, a human-computer interaction module, a controller, a transmitting coil T, and two sets of receiving coils symmetrically arranged above and below the transmitting coil T.

[0090] The first group of receiving coils includes a first lower receiving coil Sa located below the transmitting coil T and a first upper receiving coil Sb located above the transmitting coil T. The distance between the first lower receiving coil Sa and the first upper receiving coil Sb and the transmitting coil T is Ln.

[0091] The second group of receiving coils includes a second lower receiving coil Sc located below the first lower receiving coil Sa and a second upper receiving coil Sd located above the first upper receiving coil Sb. The distance between the second lower receiving coil Sc and the second upper receiving coil Sd and the transmitting coil T is Lm.

[0092] The transmitting coil T, the receiving coil and the controller are electrically connected.

[0093] During detection, determine whether the value of Bn or Bm is maximum. Bn = Ba - Bb, and Bm = Bc - Bd, where Ba is the signal strength collected by the first lower receiving coil Sa, Bb is the signal strength collected by the first upper receiving coil Sb, Bc is the signal strength collected by the second lower receiving coil Sc, and Bd is the signal strength collected by the second upper receiving coil Sd. When Bn or Bm is maximum, it indicates that a pipeline is buried beneath the detection location. The detection location is marked, and depth calculation is initiated. Finally, the marked location information and depth information are bound.

[0094] Furthermore, the detector includes a third receiving coil Se, whose axis is perpendicular to the axis of the transmitting coil T and passes through the center of the transmitting coil T. During detection, the signal polarity from the third receiving coil Se differs on the left and right sides of the pipeline, with the signal being minimum directly above the pipeline. Therefore, during detection, the polarity of the signal from the third receiving coil Se is used to determine whether the pipeline is on the left or right side of the detector, thereby improving detection efficiency.

[0095] In summary, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification. All so-called equivalent changes and modifications of the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for measuring pipeline depth using a radiation method, characterized by: Two sets of receiving coils are arranged symmetrically on the upper and lower sides of the transmitting coil (T), where: The first receiving coil group includes a first lower receiving coil (Sa) located below the transmitting coil (T) and a first upper receiving coil (Sb) located above the transmitting coil (T), and the distance between the first lower receiving coil (Sa) and the first upper receiving coil (Sb) and the transmitting coil (T) is Ln; The second receiving coil group includes a second lower receiving coil (Sc) located below the first lower receiving coil (Sa) and a second upper receiving coil (Sd) located above the first upper receiving coil (Sb), and the distance between the second lower receiving coil (Sc) and the second upper receiving coil (Sd) and the transmitting coil (T) is Lm; The intensities of the electromagnetic signals collected by the receiving coil at the detection point are: The signal strength collected by the first receiving coil (Sa) is Ba, and The signal strength collected by the first upper receiving coil (Sb) is Bb, and: The signal strength collected by the second receiving coil (Sc) is Bc, and: The signal strength collected by the second upper receiving coil (Sd) is Bd, and: Where H is the assumed pipeline depth, K is the comprehensive coefficient, then let: The solution is: When the solution value of H is obtained, it means that there is a pipeline buried underground. When Ba-Bb=0 and Bc-Bd=0, H has no solution, which means that there is no pipeline under the detection point.

2. The method for measuring pipeline depth using a radiation method according to claim 1, characterized in that: Lm is not equal to Ln.

3. The method for measuring pipeline depth by radiation method according to claim 1, characterized in that: The comprehensive coefficient Among them, Bn=Ba-Bb, Bm=Bc-Bd.

4. The method for measuring pipeline depth using a radiation method according to claim 1, characterized in that: A third receiving coil (Se) is arranged on the periphery of the transmitting coil (T), the axis of the third receiving coil (Se) is perpendicular to the axis of the transmitting coil (T), and the axis of the third receiving coil (Se) passes through the center of the transmitting coil (T).

5. The method for measuring pipeline depth using a radiation method according to claim 4, characterized in that: The third receiving coil (Se) and the transmitting coil (T) are located in the same plane.

6. The method for measuring pipeline depth using a radiation method according to any one of claims 1 to 5, characterized in that: Scan the area to be tested along the S-shaped curve or spiral line to determine whether the signal strength of Bn or Bm is the largest. If it is the largest, it means that the detector is located directly above the pipeline, and the measurement of the pipeline depth is started at this time.

7. A method for measuring pipeline path and depth using a radiation method, using the method for measuring pipeline depth according to claim 6, characterized in that: Step 1: Scan the area to be tested at the edge of the area to be tested; Step 2: After detecting the Bn or Bm signal, move within a small range and determine whether the Bn or Bm signal strength is the largest; Step 3: Mark the position where the maximum Bn or Bm signal is detected as the position of the pipeline; Step 4: Detect the pipeline depth above the pipeline location.

8. The method for measuring pipeline path and depth using radiation method according to claim 7, characterized in that In step 3: the detector is rotated at the marked position, the direction in which the Bn or Bm signal strength is the largest is the cable laying direction, and the laying direction of the pipeline is perpendicular to the axis of Bn or Bm.

9. A detector for measuring pipeline path using a radiation method, comprising a power supply module, a human-computer interaction module, and a controller, characterized in that: The device further comprises a transmitting coil (T), and two sets of receiving coils are symmetrically arranged on the upper and lower sides of the transmitting coil (T), wherein: The first receiving coil group includes a first lower receiving coil (Sa) located below the transmitting coil (T) and a first upper receiving coil (Sb) located above the transmitting coil (T), and the distance between the first lower receiving coil (Sa) and the first upper receiving coil (Sb) and the transmitting coil (T) is Ln; The second receiving coil group includes a second lower receiving coil (Sc) located below the first lower receiving coil (Sa) and a second upper receiving coil (Sd) located above the first upper receiving coil (Sb), and the distance between the second lower receiving coil (Sc) and the second upper receiving coil (Sd) and the transmitting coil (T) is Lm; The transmitting coil (T), the receiving coil and the controller are electrically connected; During detection, determine whether the value of Bn or Bm is the largest, where Bn = Ba-Bb, Bm = Bc-Bd, Ba is the signal strength collected by the first lower receiving coil (Sa), Bb is the signal strength collected by the first upper receiving coil (Sb), Bc is the signal strength collected by the second lower receiving coil (Sc), and Bd is the signal strength collected by the second upper receiving coil (Sd). When Bn or Bm is the largest, it indicates that there is a pipeline buried below the detection location, and the detection location is marked.

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